petro



(Nd Model.)

2 Sheets-Sheet 1.

S. HY. PET'RO.

INGUBATOR.

No. 446,980. Patented Feb. 24, 1891.

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mwa /f l f f f w w (No Model.) A 2 SheetSe-Sheet 2. S. H. PETRO. INGUBAT'OR.

Patented Feb. 24,1891.

v `UNITED STATES PATENTOFMCE.

SAMUEL H. PETRO, OF DARLINGTON, INDIANA, ASSIGNOR OF ONE-HALF TO VILSON HUNT, OF SAME PLACE.

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SPECIFCATION forming part of Letters Patent No. 446,980, dated February 24, 1891. Application tiled September 18, 1890. Serial No A365.397. (No model.)

Y To all whom, t may concern: four) Ventilating-tubes, which extend through Be it known that I, SAMUEL II. PETRO, a the Water-tank, and each communicates with citizen of the United States, residing at Dara compartment of the incubator. These tubes lington, in the county of Montgomery and extend up to corresponding openings l5,

State of Indiana, have invented a new and formed in the roof`11, and between the two 55 useful Incubator, of which the following is a inner tubes of the series there is located in specification. the roof a large opening 16, through which This invention has relation to incubators, passes a pipe 17, communicating with the-inthe objects in lview being to provide a means terior of the water-tank. IO for controlling the heat Within the incubator In the pipe 17 there is located a float 1S, 6o and maintaining the same at a proper tem-` the stem of which extends up through the perature for successfully carrying on the pro-z roof of the casing and is pivotally connected cess of incubation. to the meetingends of a pair of levers 19, Other objects and advantages of the inmounted in standards at opposite sides of" I5 vention will appear in the following descripthe opening 16 and between the pairs of open- 65 tion, and the novel features thereof will be ings 15. These levers extend beyond their particularly pointed out in the claim. fulcrums, and one of said levers beyond the Referring to the drawings, Figure 1 is a extended end of the roof, where itis bent perspective of an incubator constructed in upon itself, as at 21,150 form a loop.- Theloop 2O accordance with my invention. Fig. 2 is a 21 is connected to the upper end of the con- 7o vertical longitudinal section. Fig. 3 is an necting--rod 22, which latter at its lowe'rend end elevation. Fig. 4 is a perspective in deis loosely pivoted tothe lever 23, securedto tail of a Water-tank. f and extending rigidly from the wick-raising Like numerals of reference indicate like bar 24: of the lamp 7, so that any movement 25 parts in all the figures of the drawings. upon the part of the lever as caused by the 75 1 designates the incubator-case, provided movements of the float will be transmitted to at its front with the usual hinged door 2, the the wick-raising bar of the lamp, which bar interior of the case being divided into comwill be rotated partially in accordance with partments, as is usual, for the reception of the the direction of movement of said lever, and eggs to be hatched. Above the partitions thus the wick raised or lowered. The open- 8o there is located the water-tank 4f, which fits ings 15 are covered by a series of disks 26, within the outer casing and below the roof of which disks are connected to the lower ends said casing. A hot-air box 5 projects from of a series of crank-levers 27. The crank-leone end of the water-box through an opening vers 27 of the two outer disks are fulcrumed in the casing and over a platform 6, upon in short standards 28, while the crank-levers 85 which is mounted a lamp 7, the chimney of of the two inner disks are fulcrumed in the which passes into an opening 8, formed in the standards 20 below the levers 19, and all of bottom of the hot-air box. vThe hot-air box the crank-levers have their upper ends tercommunicates with an opening 9 formed in the minating under either one of the levers 19.

opposite end of the casing by means of a hot- 30 designates a spring-finger secured in 9o air pipe 1O extending longitudinally through the roof of the casing, as at 31, and terminatthe water box or tank. ing under the longer lever 19 of the pair in 11 designates the cover or roof of the casrear of its fulcrum, and therefore having a ing, and the same is lprovided at one end tendency to raise the same and thus depress with an extension 12, designed to take over the inner ends of the levers and the iloat, so 95 the hot-air box 5, and with a iiange 13 dethat pressure from the levers is normally repending from the under side thereof and moved from the upper ends of the crank-leadapted tolembrace the hot-air box upon its vers of thedisks 26.

exposed sides. In operation the heat from the lamp passes .L 5o 14 designates a series of (in this instance up the chimney thereof into the hot-air box loo and through the pipe in the water-box to the opposite end of the casing, the water in the box being heated thereby. Should the temperature of the water become too high, the expansion of the water causes the float to rise in the pipe 17, and in so doing the iuner ends ot the levers 19 are raised and their outer ends consequently depressed. A depression of the outer ends causes a depression of the inner ends of the crank-levers of the disks 26, so that said disks are raised a distance above the openings agreeing with the degree of elevation et the float., and consequeutlythe degree of heat of the water, and the hot air from the compartments permitted to pass through the tubes 14 until said compartments have been sutliciently cooled, whereupon the water in the tank having its temperature lowered contracts and permits the ioat to fall, which liberatcs the cranked levers and permits the disks JG to again cover the openings. As the longer lever l) is raised at its inner end by the expansion of the Water in the tank, itserves to depress the connecting-rod and its arm and partially rotate the Wick-operating bar of the burner of thelamp and lower said wick, whereby the Haine is decreased, as is also the heat. Then the water has been suiicientlycooled, the wick is raised as the float lowers and a reheating takes place. In this manner a proper temperature is automatically maintained in the compartments and incubation facilitated in a successtul manner.

Having described my invention, what I cla-im is- In an incubator, the combination, with the outer casing having a series of chambers and a burner located at the end of the same, of a water-tank mounted in the upper end of the casing and terminating at one end in a hotair box in which the chimney of the lamp terminates, and provided with a pipe passing through the tank and com munieating with the hot-air box, an opening formed in the roof of the casing, a pipe extending from the tank through the opening, a pair of smaller openings formed in the root of the casing at each side of said larger opening, tubes passing through the tank and communicatin g with the chambers or compartments of the incubator and passing through the smaller openings ot' the root' of the casing, a pair ot fulcrumedstandards located between cach pair of smaller openings, cranked levers mounted upon each standard and each terminating in a disk normally covering one of the smaller openings, a pair ot levers fulcrumed upon the inner standards before mentioned, loosely connected at their inner ends with the float and having their outer ends bearing upon the cranked levers, one of said long levers having its outer end bent upon itself to form a loop, an arm extending from the wick-operating bar of the burner, a rod loosely connecting the outer end of the arm with the loop of the before-n'ientioned lever, and a spring secured to the roof of the casing and terminating under the rear end of one of the levers, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

SAMUEL li. PETRO. Ti'itnesses:

C. N. 'YANCLEMYE, BENJAMIN CRANE. 

